Patents by Inventor Zane Lockhart, Jr.

Zane Lockhart, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Chuck sleeve insert for a drill
    Patent number: 5704745
    Abstract: A double-ended drill bit having opposed cutting ends of different structural configurations is provided in combination with a sleeve or holder to be received within a drill chuck. The sleeve is provided with a cylindrical body having a top end with a pair of helically-shaped longitudinally extending members in spaced mating relation attached thereto. One cutting end of a drill bit is received within the cylindrical body and the spaced helically-shaped members.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: January 6, 1998
    Assignee: Credo Tool Company
    Inventors: Juergen Wiker, David H. Byrley, Zane Lockhart, Jr., Debbie Ann Newhouse, Gregory A. Phillips